Am 30.10.2010 11:14, schrieb Der_Minimalist:
> Hi guys,
>
> I hope you can help me out with the following.
>
> I'm trying to make a glass flask and, despite using merge, I'm having problems
> with visible internal surfaces. I use an image_map to get some text on the flask
> and to prevent it from showing up on both sides I cut the flask in half and join
> it with another half that doesn't have the image map.
>
> However, when you join these two, with a small overlap so that the surfaces
> don't coincide, you can clearly see where both halves have joined by a slightly
> darker internal surface.
>
> I have included a simple overlap of two transparent spheres below to show you
> what I mean. I reckon there is a simple solution to this, but I wasn't able to
> find it on the internet..

It is rather difficult to judge from the sample scene you provided, as 
the effect might just as well be an optical effect of the "kink" in the 
CSG object's surface.

But the same effect can be seen with two cylinders joined end-to-end, 
too, so there /is/ something fishy there.

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